script (Unix)

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The script command is a Unix utility that records a terminal session.[1] The scriptreplay command offers a replay function to script.[2] The session is captured in file name typescript by default; to specify a different filename follow the script command with a space and the filename as such: script recorded_session.

The ttyrec program provides the same kind of functionality and offers several bindings.

Recorded shell sessions can be shared using online services.[3] The advantage of sessions recorded in this format from the usual screencasts is that shell instructions can be easily copy/pasted from the player screen.

Alternatives to Script Command[edit]

One of the problems with the script command is that it only allows logging of a child process; and often there is a need to log the command in the current process without spawning a new process, such as when automation of a script is needed that can log its own output. The unix operating system makes this possible by use of pipes and redirects. Consider the following model examples:

Bourne shell[edit]

All shells related to Bourne shell (namely: sh, bash, and ksh) allow the stdout and stderr to be attached to a named pipe and redirected to the tee command.

Example
LOGNAME="script"
rm -rf $LOGNAME.p $LOGNAME.log
mknod $LOGNAME.p p
tee <$LOGNAME.p $LOGNAME.log &
exec >$LOGNAME.p 2>&1

References[edit]

  1. ^ http://www.freebsd.org/cgi/man.cgi?query=script
  2. ^ LinuxInsight - Replaying terminal sessions with scriptreplay
  3. ^ OMG! Ubuntu! - How To Record And Share Terminal Screencasts Quickly

External links[edit]